Bolang Hiking Daypack Outdoor Waterproof Travel Backpacks 8278 nylon Imported Powerful removable suspension system, breathable perspiration, relieve burdened 3 front pocket, a main pocket,A bottom rain cover pocket, 2 Hipbelt Pockets cell phone/MP3 player Powerful Bear Breathable System, the heat could quickly spread out, avoiding the embarrassment of sweat, also it's more comfortable for your back Material: high quality nylon Capacity: 40L size: 20"x12"x8"